OK.harjyot said:the force on the Bob will be
weight - upthrust.
Right. So what do you think happens to the total weight of the system?by total weight I mean the weight of the whole system
The weight of a system will increase by the weight of the foreign body. This is due to the principle of buoyancy, where the weight of the displaced fluid is equal to the weight of the object.
Yes, the shape and size of the foreign body can affect the change in weight of the system. This is because the amount of fluid displaced by the foreign body will vary depending on its shape and size, therefore impacting the overall weight of the system.
Yes, the type of fluid will affect the change in weight of the system. Different fluids have different densities, and therefore the weight of the displaced fluid will vary, resulting in a different change in weight of the system.
No, the change in weight of the system may not always be equal to the weight of the foreign body. This is because the buoyant force acting on the foreign body may not be equal to its weight, depending on the density of the fluid and the volume of the foreign body.
Yes, the change in weight of the system can be negative if the density of the foreign body is less than the density of the fluid. In this case, the buoyant force will be greater than the weight of the foreign body, resulting in a decrease in the overall weight of the system.